Add support for the latest apktool version in Objection

[aancw]

Description

This PR updates Objection to fully support the latest apktool version by:

• Switching from aapt to aapt2, which is now the default in apktool.
• Removing the deprecated --use-aapt2 flag.
• Fixing command construction to avoid passing empty string arguments to apktool.
• Updating the version check command to use v instead of the old -version flag.

These updates ensure Objection remains compatible and stable with the newest apktool releases.

Here is the log:

❯ objection patchapk -s fluttersamples.apk -a arm64
Using latest Github gadget version: 17.3.0
Patcher will be using Gadget version: 17.3.0
Detected apktool version as: 2.12.0
Running apktool empty-framework-dir...
I: Removing framework file: 1.apk
Unpacking fluttersamples.apk
App already has android.permission.INTERNET
Target class not specified, searching for launchable activity instead...
Reading smali from: /var/folders/_8/v5b47jgd4p529gtngdp1778c0000gn/T/tmpi05vnu2h.apktemp/smali/cm/aptoide/pt/view/MainActivity.smali
Injecting loadLibrary call at line: 86
Attempting to fix the constructors .locals count
Current locals value is 0, updating to 1:
Writing patched smali back to: /var/folders/_8/v5b47jgd4p529gtngdp1778c0000gn/T/tmpi05vnu2h.apktemp/smali/cm/aptoide/pt/view/MainActivity.smali
Creating library path: /var/folders/_8/v5b47jgd4p529gtngdp1778c0000gn/T/tmpi05vnu2h.apktemp/lib/arm64
Copying Frida gadget to libs path...
Rebuilding the APK with the frida-gadget loaded...
Built new APK with injected loadLibrary and frida-gadget
Performing zipalign
Zipalign completed
Signing new APK.
Signing the new APK may have failed.

WARNING: A restricted method in java.lang.System has been called
WARNING: java.lang.System::loadLibrary has been called by org.conscrypt.NativeLibraryUtil in an unnamed module (file:/Users/Library/Android/sdk/build-tools/36.0.0/lib/apksigner.jar)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

Unexpected parameter(s) after input APK (--enable-native-access=ALL-UNNAMED)

Signed the new APK
Copying final apk from /var/folders/_8/v5b47jgd4p529gtngdp1778c0000gn/T/tmpi05vnu2h.apktemp.aligned.objection.apk to fluttersamples.objection.apk in current directory...
Cleaning up temp files...

❯ ls | grep flutter
fluttersamples.apk
fluttersamples.objection.apk

[aancw]

I initially thought this patch might duplicate the changes in #753, but after reviewing it more closely, this PR includes additional improvements not covered there:

• Switch from aapt to aapt2, matching apktool's current default.
• Remove the now-unnecessary --use-aapt2 flag.
• Clean up apktool command construction to avoid passing empty string arguments (using filter(None, [...])).

These changes improve compatibility and reduce possible issues when using the latest apktool.

Happy to adjust or collaborate if needed.

[Diolor]

Thanks @aancw! Tested it locally 👍